@article {959, title = {Euglossa obrima, a new species of orchid bee from Mesoamerica, with notes on the subgenus Dasystilbe Dressler (Hymenoptera, Apidae)}, journal = {ZooKeys}, volume = {97}, year = {2011}, chapter = {11-29}, author = {Hinojosa-Diaz, I. A. and Melo, G. A. R. and Engel, M.S.} } @article {694, title = {Forrajeo en colonias de Melipona eburnea (Hymenoptera: Apidae) en el piedemonte llanero (Meta, Colombia)}, journal = {Revista Colombiana de Entomolog{\'{\i}a}, volume = {37}, year = {2011}, chapter = {121-127}, author = {Nates-Parra, G. and Rodriguez, A} } @article {1744, title = {Host records of Physocephala wulpi Camras, with a description of the puparium (Diptera: Conopidae)}, journal = {Zootaxa}, volume = {3038}, year = {2011}, pages = {61-67}, chapter = {61}, abstract = {

Physocephala wulpi Camras was reared from Xylocopa artifex Smith, Xylocopa augusti Lepeletier, and Xylocapa splendidula Lepeletier. The puparium is described. An overview of conopid host records from the Neotropic Region, and records from Conopidae that develop in Xylocopa, is provided

}, keywords = {Argentina, cephalopharyngeal skeleton, Conopidae, DIPTERA, Hymenoptera, Neotropics, Physocephala, puparium, Xylocopa}, issn = {1175-5334}, author = {Jensen-Hermann Stuke and Mariano Lucia and Alberto H Abrahamovich} } @article {1730, title = {Study of the acarofauna of native bumblebee species (Bombus) from Argentina}, journal = {Apidologie}, volume = {42}, year = {2011}, pages = {280-292}, chapter = {280}, abstract = {

A total of 382 bumblebee specimens were examined: Bombus atratus (n = 310), Bombus morio (n = 42), Bombus bellicosus (n = 16), Bombus opifex (n = 8), and Bombus tucumanus (n = 6). Prevalence, abundance, and intensity of mite infestation for each Bombus species and for each caste were recorded. The different mite species infesting bumblebee specimens were: Kuzinia laevis (Dujardin), Kuzinia americana (Delfinado and Baker), Scutacarus acarorum (Goeze), Pneumolaelaps longanalis (Hunter and Husband), Pneumolaelaps longipilus (Hunter), Tyrophagus putrescentiae (Schrank), and Parasitellus fucorum (De Geer). Numbers of mites varied enormously and ranged from 1 individual to over 200 per bumblebee. Kuzinia mites were represented by the phoretic forms (hypopi). Only nymphs of P. fucorum were recorded. Only female mites were recorded for the other mite species. T. putrescientiae, P. longipilus, S. acarorum, and P. fucorum were less abundant, while K. laevis, K. americana, and P. longanalis were the most abundant. These records of T. putrescientiae, P. fucorum, K. laevis, K. americana, P. longipilus, and S. acarorum are the first for Argentine bumblebees.

}, keywords = {bumblebees Argentina associated mites}, issn = {0044-8435}, doi = {DOI: 10.1051/apido/2010060}, url = {http://www.springerlink.com/content/a32116w1g7j1342x/}, author = {Matias Maggi and Mariano Lucia and Alberto H Abrahamovich} } @article {650, title = {Two new species of Paratrigona and the male of Paratrigona ornaticeps (Hymenoptera, Apidae)}, journal = {ZooKeys}, volume = {120}, year = {2011}, type = {Research Article}, chapter = {9-25}, keywords = {Anthophila, Ecuador, Meliponini, Neotropics, Paraguay, stingless bees, taxonomy}, doi = {10.3897/ZooKeys.120.1732}, url = {http://www.pensoft.net/journals/zookeys/article/1732/two-new-species-of-paratrigona-schwarz-and-the-male-of-paratrigona-ornaticeps-schwarz-hymenoptera-apidae-}, author = {Gonzalez, V.H. and Griswold, T.} } @article {21475736, title = {Olfactory eavesdropping between two competing stingless bee species.}, journal = {Behavioral Ecology and Sociobiology}, volume = {65}, year = {2011}, month = {2011 Apr}, pages = {763-774}, chapter = {763}, abstract = {Foragers can improve search efficiency, and ultimately fitness, by using social information: cues and signals produced by other animals that indicate food location or quality. Social information use has been well studied in predator-prey systems, but its functioning within a trophic level remains poorly understood. Eavesdropping, use of signals by unintended recipients, is of particular interest because eavesdroppers may exert selective pressure on signaling systems. We provide the most complete study to date of eavesdropping between two competing social insect species by determining the glandular source and composition of a recruitment pheromone, and by examining reciprocal heterospecific responses to this signal. We tested eavesdropping between Trigona hyalinata and Trigona spinipes, two stingless bee species that compete for floral resources, exhibit a clear dominance hierarchy and recruit nestmates to high-quality food sources via pheromone trails. Gas chromatography-mass spectrometry of T. hyalinata recruitment pheromone revealed six carboxylic esters, the most common of which is octyl octanoate, the major component of T. spinipes recruitment pheromone. We demonstrate heterospecific detection of recruitment pheromones, which can influence heterospecific and conspecific scout orientation. Unexpectedly, the dominant T. hyalinata avoided T. spinipes pheromone in preference tests, while the subordinate T. spinipes showed neither attraction to nor avoidance of T. hyalinata pheromone. We suggest that stingless bees may seek to avoid conflict through their eavesdropping behavior, incorporating expected costs associated with a choice into the decision-making process. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00265-010-1080-3) contains supplementary material, which is available to authorized users.}, keywords = {Cephalic labial glands, Decision making, Dominance, Foraging, Interceptive eavesdropping, Social information}, doi = {10.1007/s00265-010-1080-3}, url = {http://www.springerlink.com/content/q080407tx1455347/}, author = {Lichtenberg, Elinor M and Hrncir, Michael and Turatti, Izabel C and Nieh, James C} } @article {1720, title = {Walkeromya plumipes (Philippi) (Diptera: Bombyliidae), a parasitoid associated with carpenter bees (Hymenoptera: Apidae: Xylocopini) in Argentina}, journal = {Zootaxa}, volume = {2935}, year = {2011}, month = {07/2011}, pages = {41-46}, chapter = {41}, abstract = {

This is the first record of the association between Walkeromya plumipes (Philippi) (Diptera: Bombyliidae) and Xylocopa Latreille (Hymenoptera: Apidae) in Argentina. The pupal development and morphology of Walkeromya plumipes, a parasitoid of Xylocopa splendidula Lepeletier, are described. A parasitized nest was collected from Santiago del Estero province, Argentina. The development of the bombyliid fly and large carpenter bees in the nest were observed in the laboratory for a period of 28 days. A detailed description of the fly adult and pupal stages were carried out. This is the first record of W. plumipes parasitizing X. splendidula. This is also the first complete description of this fly species, including male genitalia. With the data presented here the geographical distribution of the parasite is expanded. The results suggest a close relation between the parasitoid and its host, as the genus Walkeromya Paranov has been found parasitizing only carpenter bees of genus Xylocopa.

}, keywords = {genitalia description, host-parasitoid association, pupal development}, issn = {1175-5334}, url = {www.mapress.com/zootaxa/2011/f/z02935p046f.pdf}, author = {Omar {\'A}valos-Hern{\'a}ndez and Mariano Lucia and Leopoldo J Alvarez and Alberto H Abrahamovich} } @article {1700, title = {Chalepogenus roitmani Roig Alsina (Hymenoptera: Apidae: Tapinotaspidini): description of the male and new geographical records for the species}, journal = {Zootaxa}, volume = {2797}, year = {2011}, chapter = {21-24}, author = {Torretta, J. P. and Marrero, H. J. and Roig Alsina, A} } @article { ISI:000290524600003, title = {Morphological and molecular delineation of a new species in the Ceratina dupla species-group (Hymenoptera: Apidae: Xylocopinae) of eastern North America}, journal = {ZOOTAXA}, number = {{2873}}, year = {2011}, month = {MAY 10}, pages = {35-50}, abstract = {DNA barcoding is used to verify characters to morphologically differentiate genetically distinct species of eastern North American small carpenter bees, Ceratina. Here we reveal that the common eastern North American species, Ceratina dupla s. l., is actually three separate species based on fixed differences in DNA barcode sequences and morphological characters. This study adds a new species, C. mikmaqi Rehan \& Sheffield, to the Ceratina dupla species-group of eastern North America, and raises another form, C. floridana formerly C. dupla floridana, to full species. Temporal niche partitioning between C. dupla and C. mikmaqi and geographic isolation of C. floridana further support the division of the C. dupla s. l. group into three species. A diagnosis and description of the new species are provided, as is a key for eastern North American species of Ceratina.}, keywords = {Cryptic species, DNA barcodes, taxonomy, Zadontomerus}, issn = {1175-5326}, author = {Rehan, Sandra M. and Sheffield, Cory S.} } @article {1631, title = {Breeding biology of the threadstalk milkvetch, Astragalus filipes (Fabaceae), with a review of the genus}, journal = {American Midland Naturalist}, volume = {165}, year = {2011}, month = {2011///}, pages = {225 - 240}, abstract = {Astragalus L. (Fabaceae) is an enormous and diverse plant genus with a cosmopolitan distribution, but relatively few breeding biologies are known for its member species. Threadstalk (or basalt) milkvetch, Astragalus filipes Torrey ex. A. Gray, is common and widespread throughout the US Intermountain West, including the Great Basin. It is being studied and ultimately propagated for extensive rangeland restoration projects throughout the sagebrush steppe. Understanding the breeding biology of A. filipes will be necessary for reliable and consistent commercial seed production with this species. We examined reproductive output from four manual pollination treatments (autogamy, geitonogamy, xenogamy and distant xenogamy) in a common garden. As measures of fitness, we counted fruit and seed set, then germinated viable seeds, to assess reproductive output. This species is weakly self compatible; xenogamous pollen transfer results in nine times more seed per pollination. Pollen transfer between geographically distant seed accessions resulted in a decrease in seed germination, but no difference in fruit or seed set. Cross pollination by bees will be necessary for copious seed production by this species. In the wild, flowers of A. filipes are visited most commonly and ubiquitously by a diversity of Osmia bee species plus several bee species each of Eucera, Anthidium, Bombus and sometimes Hoplitis.}, keywords = {ASTRAGALUS, BOMBUS, FABACEAE, FRUIT SET, Megachilidae, OSMIA, OUTCROSSING, POLLINATION, POLLINATOR, SEED PRODUCTION, SEED SET, SELF-COMPATIBILITY}, author = {Watrous,K.W. and Cane, J. H.} } @article {1593, title = {Pollination value of male bees: The specialist bee Peponapis pruinosa (Apidae) at summer squash (Cucurbita pepo)}, journal = {Environmental Entomology}, volume = {40}, year = {2011}, month = {2011///}, pages = {614 - 620}, abstract = {Male bees can be abundant at flowers, particularly floral hosts of those bee species whose females are taxonomic pollen specialists (oligolecty). Contributions of male bees to host pollination are rarely studied directly despite their prevalence in a number of pollination guilds, including those of some crop plants. In this study, males of the oligolectic bee, Peponapis pruinosa Say, were shown to be effective pollinators of summer squash, Cucurbita pepo L. Seven sequential visits from male P. pruinosa maximized squash fruit set and growth. This number of male visits accumulated during the first hour of their foraging and mate searching at flowers soon after sunrise. Pollination efficacy of male P. pruinosa and their abundances at squash flowers were sufficient to account for most summer squash production at our study sites, and by extrapolation, to two-thirds of all 87 North American farms and market gardens growing squashes that were surveyed for pollinators by collaborators in the Squash Pollinators of the Americas Survey. We posit that the substantial pollination value of male Peponapis bees is a consequence of their species{\textquoteright} oligolecty, their mate seeking strategy, and some extreme traits of Cucurbita flowers (massive rewards, flower size, phenology).}, keywords = {CUCURBITACEAE, FRUIT SET, FRUIT SIZE, OLIGOLECTY, Peponapis, POLLINATION, POLLINATION EFFICIENCY, POLLINATION INTENSITY, SEED SET}, url = {http://www.ingentaconnect.com/content/esa/envent/2011/00000040/00000003/art00014;http://dx.doi.org/10.1603/EN10084}, author = {Cane,James H. and Sampson,Blair J. and Miller,Stephanie A.} }